AppCompatRatingBar

This package is part of the
Android support library which
is no longer maintained.
The support library has been superseded by AndroidX
which is part of Jetpack.
We recommend using the AndroidX libraries in all new projects. You should also consider
migrating existing projects to AndroidX.

A RatingBar which supports compatible features on older versions of the platform.

This will automatically be used when you use RatingBar in your layouts
and the top-level activity / dialog is provided by
appcompat.
You should only need to manually use this class when writing custom views.